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path: root/drivers/media/video/videobuf-vmalloc.c
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Diffstat (limited to 'drivers/media/video/videobuf-vmalloc.c')
-rw-r--r--drivers/media/video/videobuf-vmalloc.c112
1 files changed, 53 insertions, 59 deletions
diff --git a/drivers/media/video/videobuf-vmalloc.c b/drivers/media/video/videobuf-vmalloc.c
index 136e09383c0..d6a8a38dc9c 100644
--- a/drivers/media/video/videobuf-vmalloc.c
+++ b/drivers/media/video/videobuf-vmalloc.c
@@ -30,8 +30,12 @@
#define MAGIC_DMABUF 0x17760309
#define MAGIC_VMAL_MEM 0x18221223
-#define MAGIC_CHECK(is,should) if (unlikely((is) != (should))) \
- { printk(KERN_ERR "magic mismatch: %x (expected %x)\n",is,should); BUG(); }
+#define MAGIC_CHECK(is, should) \
+ if (unlikely((is) != (should))) { \
+ printk(KERN_ERR "magic mismatch: %x (expected %x)\n", \
+ is, should); \
+ BUG(); \
+ }
static int debug;
module_param(debug, int, 0644);
@@ -40,19 +44,19 @@ MODULE_DESCRIPTION("helper module to manage video4linux vmalloc buffers");
MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@infradead.org>");
MODULE_LICENSE("GPL");
-#define dprintk(level, fmt, arg...) if (debug >= level) \
- printk(KERN_DEBUG "vbuf-vmalloc: " fmt , ## arg)
+#define dprintk(level, fmt, arg...) \
+ if (debug >= level) \
+ printk(KERN_DEBUG "vbuf-vmalloc: " fmt , ## arg)
/***************************************************************************/
-static void
-videobuf_vm_open(struct vm_area_struct *vma)
+static void videobuf_vm_open(struct vm_area_struct *vma)
{
struct videobuf_mapping *map = vma->vm_private_data;
- dprintk(2,"vm_open %p [count=%u,vma=%08lx-%08lx]\n",map,
- map->count,vma->vm_start,vma->vm_end);
+ dprintk(2, "vm_open %p [count=%u,vma=%08lx-%08lx]\n", map,
+ map->count, vma->vm_start, vma->vm_end);
map->count++;
}
@@ -63,7 +67,7 @@ static void videobuf_vm_close(struct vm_area_struct *vma)
struct videobuf_queue *q = map->q;
int i;
- dprintk(2,"vm_close %p [count=%u,vma=%08lx-%08lx]\n", map,
+ dprintk(2, "vm_close %p [count=%u,vma=%08lx-%08lx]\n", map,
map->count, vma->vm_start, vma->vm_end);
map->count--;
@@ -116,8 +120,7 @@ static void videobuf_vm_close(struct vm_area_struct *vma)
return;
}
-static const struct vm_operations_struct videobuf_vm_ops =
-{
+static const struct vm_operations_struct videobuf_vm_ops = {
.open = videobuf_vm_open,
.close = videobuf_vm_close,
};
@@ -137,23 +140,23 @@ static void *__videobuf_alloc(size_t size)
struct videobuf_vmalloc_memory *mem;
struct videobuf_buffer *vb;
- vb = kzalloc(size+sizeof(*mem),GFP_KERNEL);
+ vb = kzalloc(size + sizeof(*mem), GFP_KERNEL);
if (!vb)
return vb;
- mem = vb->priv = ((char *)vb)+size;
- mem->magic=MAGIC_VMAL_MEM;
+ mem = vb->priv = ((char *)vb) + size;
+ mem->magic = MAGIC_VMAL_MEM;
- dprintk(1,"%s: allocated at %p(%ld+%ld) & %p(%ld)\n",
- __func__,vb,(long)sizeof(*vb),(long)size-sizeof(*vb),
- mem,(long)sizeof(*mem));
+ dprintk(1, "%s: allocated at %p(%ld+%ld) & %p(%ld)\n",
+ __func__, vb, (long)sizeof(*vb), (long)size - sizeof(*vb),
+ mem, (long)sizeof(*mem));
return vb;
}
-static int __videobuf_iolock (struct videobuf_queue* q,
- struct videobuf_buffer *vb,
- struct v4l2_framebuffer *fbuf)
+static int __videobuf_iolock(struct videobuf_queue *q,
+ struct videobuf_buffer *vb,
+ struct v4l2_framebuffer *fbuf)
{
struct videobuf_vmalloc_memory *mem = vb->priv;
int pages;
@@ -177,15 +180,13 @@ static int __videobuf_iolock (struct videobuf_queue* q,
dprintk(1, "%s memory method USERPTR\n", __func__);
-#if 1
if (vb->baddr) {
printk(KERN_ERR "USERPTR is currently not supported\n");
return -EINVAL;
}
-#endif
/* The only USERPTR currently supported is the one needed for
- read() method.
+ * read() method.
*/
mem->vmalloc = vmalloc_user(pages);
@@ -210,7 +211,7 @@ static int __videobuf_iolock (struct videobuf_queue* q,
/* Try to remap memory */
rc = remap_vmalloc_range(mem->vma, (void *)vb->baddr, 0);
if (rc < 0) {
- printk(KERN_ERR "mmap: remap failed with error %d. ", rc);
+ printk(KERN_ERR "mmap: remap failed with error %d", rc);
return -ENOMEM;
}
#endif
@@ -273,7 +274,7 @@ static int __videobuf_mmap_mapper(struct videobuf_queue *q,
break;
}
if (VIDEO_MAX_FRAME == first) {
- dprintk(1,"mmap app bug: offset invalid [offset=0x%lx]\n",
+ dprintk(1, "mmap app bug: offset invalid [offset=0x%lx]\n",
(vma->vm_pgoff << PAGE_SHIFT));
return -EINVAL;
}
@@ -300,8 +301,7 @@ static int __videobuf_mmap_mapper(struct videobuf_queue *q,
printk(KERN_ERR "vmalloc (%d pages) failed\n", pages);
goto error;
}
- dprintk(1, "vmalloc is at addr %p (%d pages)\n",
- mem->vmalloc, pages);
+ dprintk(1, "vmalloc is at addr %p (%d pages)\n", mem->vmalloc, pages);
/* Try to remap memory */
retval = remap_vmalloc_range(vma, mem->vmalloc, 0);
@@ -315,7 +315,7 @@ static int __videobuf_mmap_mapper(struct videobuf_queue *q,
vma->vm_flags |= VM_DONTEXPAND | VM_RESERVED;
vma->vm_private_data = map;
- dprintk(1,"mmap %p: q=%p %08lx-%08lx (%lx) pgoff %08lx buf %d\n",
+ dprintk(1, "mmap %p: q=%p %08lx-%08lx (%lx) pgoff %08lx buf %d\n",
map, q, vma->vm_start, vma->vm_end,
(long int) q->bufs[first]->bsize,
vma->vm_pgoff, first);
@@ -330,15 +330,15 @@ error:
return -ENOMEM;
}
-static int __videobuf_copy_to_user ( struct videobuf_queue *q,
- char __user *data, size_t count,
- int nonblocking )
+static int __videobuf_copy_to_user(struct videobuf_queue *q,
+ char __user *data, size_t count,
+ int nonblocking)
{
- struct videobuf_vmalloc_memory *mem=q->read_buf->priv;
- BUG_ON (!mem);
- MAGIC_CHECK(mem->magic,MAGIC_VMAL_MEM);
+ struct videobuf_vmalloc_memory *mem = q->read_buf->priv;
+ BUG_ON(!mem);
+ MAGIC_CHECK(mem->magic, MAGIC_VMAL_MEM);
- BUG_ON (!mem->vmalloc);
+ BUG_ON(!mem->vmalloc);
/* copy to userspace */
if (count > q->read_buf->size - q->read_off)
@@ -350,30 +350,30 @@ static int __videobuf_copy_to_user ( struct videobuf_queue *q,
return count;
}
-static int __videobuf_copy_stream ( struct videobuf_queue *q,
- char __user *data, size_t count, size_t pos,
- int vbihack, int nonblocking )
+static int __videobuf_copy_stream(struct videobuf_queue *q,
+ char __user *data, size_t count, size_t pos,
+ int vbihack, int nonblocking)
{
- unsigned int *fc;
- struct videobuf_vmalloc_memory *mem=q->read_buf->priv;
- BUG_ON (!mem);
- MAGIC_CHECK(mem->magic,MAGIC_VMAL_MEM);
+ unsigned int *fc;
+ struct videobuf_vmalloc_memory *mem = q->read_buf->priv;
+ BUG_ON(!mem);
+ MAGIC_CHECK(mem->magic, MAGIC_VMAL_MEM);
if (vbihack) {
/* dirty, undocumented hack -- pass the frame counter
* within the last four bytes of each vbi data block.
* We need that one to maintain backward compatibility
* to all vbi decoding software out there ... */
- fc = (unsigned int*)mem->vmalloc;
- fc += (q->read_buf->size>>2) -1;
+ fc = (unsigned int *)mem->vmalloc;
+ fc += (q->read_buf->size >> 2) - 1;
*fc = q->read_buf->field_count >> 1;
- dprintk(1,"vbihack: %d\n",*fc);
+ dprintk(1, "vbihack: %d\n", *fc);
}
/* copy stuff using the common method */
- count = __videobuf_copy_to_user (q,data,count,nonblocking);
+ count = __videobuf_copy_to_user(q, data, count, nonblocking);
- if ( (count==-EFAULT) && (0 == pos) )
+ if ((count == -EFAULT) && (0 == pos))
return -EFAULT;
return count;
@@ -392,7 +392,7 @@ static struct videobuf_qtype_ops qops = {
.vmalloc = videobuf_to_vmalloc,
};
-void videobuf_queue_vmalloc_init(struct videobuf_queue* q,
+void videobuf_queue_vmalloc_init(struct videobuf_queue *q,
const struct videobuf_queue_ops *ops,
struct device *dev,
spinlock_t *irqlock,
@@ -404,20 +404,19 @@ void videobuf_queue_vmalloc_init(struct videobuf_queue* q,
videobuf_queue_core_init(q, ops, dev, irqlock, type, field, msize,
priv, &qops);
}
-
EXPORT_SYMBOL_GPL(videobuf_queue_vmalloc_init);
-void *videobuf_to_vmalloc (struct videobuf_buffer *buf)
+void *videobuf_to_vmalloc(struct videobuf_buffer *buf)
{
- struct videobuf_vmalloc_memory *mem=buf->priv;
- BUG_ON (!mem);
- MAGIC_CHECK(mem->magic,MAGIC_VMAL_MEM);
+ struct videobuf_vmalloc_memory *mem = buf->priv;
+ BUG_ON(!mem);
+ MAGIC_CHECK(mem->magic, MAGIC_VMAL_MEM);
return mem->vmalloc;
}
EXPORT_SYMBOL_GPL(videobuf_to_vmalloc);
-void videobuf_vmalloc_free (struct videobuf_buffer *buf)
+void videobuf_vmalloc_free(struct videobuf_buffer *buf)
{
struct videobuf_vmalloc_memory *mem = buf->priv;
@@ -442,8 +441,3 @@ void videobuf_vmalloc_free (struct videobuf_buffer *buf)
}
EXPORT_SYMBOL_GPL(videobuf_vmalloc_free);
-/*
- * Local variables:
- * c-basic-offset: 8
- * End:
- */
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-14 15:06:42 +0000